Many high-IQ societies have come and gone; quite a few are defunct. Some societies are
simply jokes (some intentionally and some unintentionally). There are now more than a
dozen active high-IQ societies, but they're not all the same, either. Some are not exactly
high-IQ societies. Some are new and not quite underway, so it's not yet clear to
which category they belong. Some are openly proprietary. Some are repressive. And some are
democratic forums where ideas are exchanged freely. The joke and defunct societies are not
listed here; information about the currently active high-IQ societies is presented in Part
1.

Basic information about the societies is given in Table 1 and Table 2, below, which are
followed by some notes on the societies. The sources of this data include the societies'
Web sites, e-mail inquiries, and published journals. The category to which I assign each
society is listed in Table 2. Part 2 contains Table 3, showing the tests accepted by the
various societies. Part 3 contains Table 4, providing information about each test
(including my opinon as to which of them are real intelligence tests). Part 4 contains
Table 5, showing comparative performance of high-IQ-society members on a variety of tests,
Table 6, showing comparative performance on Polymath Systems tests, and some discussion of
the implications of this data.

For more information about the societies listed here and various strange and defunct
groups, including a "Short (and Bloody) History of the High-IQ Societies," see
Darryl Miyaguchi's "Uncommonly Difficult IQ Tests" Web site <http://www.eskimo.com/~miyaguch/hard_iq.html>.
For a snapshot of the turbulent events in the Triple Nine Society in the late 1980's, see
the archive of documents relating to high-IQ-society
history and governance which I have established on this site. Contributions to the archive
are solicited. We need to keep an eye on the people occupying positions of power in the
societies, for our own protection. Members of Triple Nine also have access to a
correspondence archive covering events in the late 1990's on the society's Web site. And
members of the various TNS listservs (and the theft_of_fire alternative listserv for
Prometheus members) may access Web archives on Yahoo!Groups. I believe that study of the
history of the societies is important as a way of educating society members about the
manipulation of public opinion by certain members with a craving for power that has
wracked and nearly wrecked the societies time and again.

Additions and corrections to the information presented here are solicited.

A proprietary society is a society operated by one or a few individuals, not through
democratic institutions. This is the default category when there is no evidence of
democracy, such as a constitution or bylaws or mention of election of officers. A
repressive society is one in which there may or may not be nominally democratic
institutions but control is firmly in the hands of a ruling clique which seeks to impose
its will on the membership, especially through restrictions on free speech. I strongly
recommend avoiding repressive societies. Although it is in the nature of democracy to be
imperfect and the societies listed as "democratic" above are certainly no
exception, they provide a climate of freedom of thought lacking in the non-democratic
societies.

Internet-only society.

Admission to Cerebrals requires three tests: a preliminary entrance test;
the Omega Contemplative Items Pool, by Tommy Smith; and the G-Test, by Nik Lygeros.
Cerebrals and the Omega test are not listed in Table 3.

Anyone who has scored 164 or above on a Polymath Systems test is a member
of the Four Sigma Society.

There is no such thing as an "East Coast Faction" of the Mega Society;
that was
just Chris Langan, all by himself, publishing an imitation "Noesis," filled with
his own writings, in which he presumed to speak for everyone else, completely ignoring the
expressed will of the membership.

Brief Descriptions of the Various High-IQ Societies

International High-IQ Society (95th percentile)

An Internet-based society with a sizable membership and many activities.

Sigma II (97.7the percentile)

A small society whose primary communications are in European languages other than
English. There are other levels of the Sigma Society, up to Sigma VI, but they make use of
proprietary tests of questionable validity and are not listed here.

Mensa (98th percentile)

The largest and oldest of the high-IQ societies, Mensa has chapters in
major cities, and some smaller communities, throughout the industrialized world. With
100,000 members, there is, of course, no single "Mensa type," but many have
found the atmosphere in Mensa not to their liking. There are many immature people, often
with very little restraint. But within Mensa there are also many intelligent, thoughtful,
and generous people. One must choose the activities one becomes involved in carefully to
take advantage of what is of value without getting involved in a lot of nonsense.

Top One Percent Society and One-in-a-Thousand Society (99th
and 99.9th percentile, respectively)

Basically, journals published by Ron Hoeflin. There is some good
material, but there are more lively exchanges elsewhere.

Intertel (99th percentile)

Very much like Mensa, but smaller and more conservative.

Poetic Genius Society (99.5th percentile)

A small group with a primary emphasis on poetry.

Colloquy (99.5th percentile)

A lively, Internet-based society. I'd tell you more about it, but my application for
membership was blackballed.

Cerebrals (99.7th percentile)

A small but active group, with an online journal, message boards, and an interesting
Web site.

International Society for Philosophical Enquiry (99.9th percentile)

The most pretentious of all the high-IQ societies, and the least democratic. One joins
the ISPE as an "Associate Member" and can only ascend to the higher levels of
Member, Fellow, Senior Fellow, Senior Research Fellow, and Diplomate by submitting
applications for promotion listing various "accomplishments," such as
publications, degrees earned, correspondence with other members, etc., on which the ISPE
officers pass judgement. The highest rank, "Philosopher," is awarded only to
"deserving" members of the inner circle. Most ISPE "Associates" don't
participate in this silly business, so the majority of ISPE affiliates are always
Associates--but Associate Members can't vote. Everything is designed to concentrate power
in the hands of a ruling clique. Officers' appointments and proposals affecting governance
of the society are routinely rubber-stamped. Dissent is not tolerated. At least ten people
have been expelled from the ISPE--including the five founders of TNS, for offering ISPE
members a democratic alternative (we were expelled by a secret committee without being
offered the opportunity for a defense and without a vote of the membership). The ISPE's
slogan is "Quaere Verum." Queer indeed.

Glia (99.9th percentile)

A small society based in the Netherlands.

IQuadrivium (99.9th percentile)

A group originally concentrated in the U.S. Pacific Northwest but now including members
in other areas as well. Not active at present.

Triple Nine Society (99.9th percentile)

Established in 1978 by five members of the ISPE tired of the oppressive policies of
that society's leadership. TNS is an active group which publishes an interesting journal.
There's an active unofficial e-mail list (and several official lists as well). An annual
meeting is usually held at the time of American Mensa Annual Gathering. See the results of
the 2000 Triple Nine Society Political Survey at http://www.triplenine.org/poll/index.html
.

Prometheus Society (99.997th percentile)

An active society with a very interesting journal and an active e-mail list. Some
Prometheus officers and some other members have strong objections to free speech in the
society's communication channels; they don't want their specious arguments debunked and
their misconduct exposed. I favor excluding only the legally problematical, ad hominem
arguments, and crude sexual and scatological characterizatons of individuals. Fortunately,
there is enough resistance to this movement that recent attempts to expel me from the
society and to impose draconian standards of so-called "civility" have failed.
Free expression in Prometheus seems to be in less danger than it was a short time ago.

Four Sigma Society (99.997th percentile)

A society founded on the basis of high scores on my Langdon Adult Intelligence Test. As
a result of publication of this test in Omni in 1979, it has been taken by over
27,000 people. Members are also accepted on the basis of scores on other Polymath Systems
tests. About 600 have made four-sigma-level scores. The society has been reactivated after
a long period of dormancy.

Pi Society (99.9999th percentile)

A new society at the mega level.

Mega Society (99.9999th percentile)

The original Mega Society, founded by Ronald K. Hoeflin in 1982, is the successor to
Chris Harding's 501 (one in 105) and 606 (six in 106) societies. At one point, early in the society's history,
there was a dispute between Ron Hoeflin and a number of other members regarding whether
the society would be democratic or run by Dr. Hoeflin. Dr. Hoeflin lost a membership vote,
left Mega, and founded another society at the same level, known variously as the Mega
Society, the One-in-a-Million Society, the Noetic Society, the Titan Society, and the
Hoeflin Research Group. The two groups later recombined. For several years, until early
2004, member Chris Langan, who wished to use the society as a vehicle for his own
projects, operated what he called the "Mega Society East"; the society obtained
a court order prohibiting Mr. Langan from using the society's name and the name of its
journal and won an ICANN arbitration over the domains megasociety.com and megasociety.net.
Mega publishes an interesting but infrequent journal, Noesis,
currently edited by Kevin Langdon.